Muffler.



N'zzwsn im. 17, 1910.

Patented OO. 17, 1911.

W. H. WINSLOW MUFFLEB. Nuon-10N r1LEn'nno-1s, 190s. 1u: 1 ,005, 9 1 3www "mw w N *Iliff 4 ,mijn 4 .mw ff W. H. WINSLOW.

MUFPLER.

20.12, 190s. nvmmwnv JAN. 17. 1910.

Patented Oct. 17, 1911.

2 SHBBTB--SHEET 2.

WI'In' E' '5' ses vehicle, and 24 represents the semi-cylindrical 'aftliuc from the boiler of the engine. The pipe Q1 is supported by theshell 24 and is held thereto by bands 25 whose ends ZGpaSS through the.f-:hell 24 and are riveted thereto. The outlet stud 20 passes throughtht shell 2l and thus the exhaust end ot' the lnnlller is supported. Theother end of the niulller is carried by a band 27 whose ends Q8 are4eecured to the shell 24 by means of rivets or by means of bolts-29, asshown.

A multiplicity ofJl'iafssagen'ays 30 is pro- 'rided for connecting'theinterior of the pipe 7 withthe interior of the shell l. Thesepassageways, as shown, in F ig. 1, are provided by small pipes or tubts3l extending through openings 32 drilled through the wall of pipe 7.These @duction tubes1 are of considerable length in comparison to thethickness,l of the wall of pipe 7 and of comparatively small diameter.The exhaust gas entering with considerable force t'roln the engine`exhaust into the pipe 7 must flow through these eduction Itubes and isbroken up into a multiplicity of streams. The tubes, however, interposeconsiderable resistance to the flow of the streams, and the energy inthe gas, `which would tend to produce noise ie in greater part.trzma'tornu-rl. Io further re- 'duce and destror the noise factors, lyhave Iarranged the tubes ao that the regularity of flou' and directionis broken. lf the tubes were all ofthe ,saine lengt-h and their outl sall in the reuneplane, the noise factors of t ie. individual streamswould art rumulatively, but by haring the tubes of vaiving length andarranged to direct the streams in varying directions, thi:-A unit orcumulative tendency is broken up and practically complete maillingresults. As shown in l? 1 and 2, rows of openings 3i. are drilledthrough the 'pipe I and the tubes 3l, inserted and secured in anysuitable manner, as by .soldering or threading. As shown the tubes areof varying length, sonic being shorter and some longer. The ulrrangementis also shown whereby tubes n'iay cause, the streamsv tberetlnrough toact diti'elrently upon each other` .see 'For example, tubes 230 and 30in Fig. l, whose. ends are turned toward each other so that'A thestreams issuing therefrom will strike each other and neutralize eachother-s energy .so that there will be no rcsultant noise. The tubes`mali also Ybe of varying diameter' and I preferably elnploy a pluralityof larger tubes, which will allow the escape of 'water of condensationfrom the pipe 'i'. The aggregate area of the tuberi should also be auchwith .relation to the cross-sectional area ol" the pipe 7 so that therewill be no back presa-ure on the engine. lin4 opening 33 ivili beprovided in` the end 2 by means `of which a suitable gage (not shown)can be connected with the pipe? to test for back pressure. The exhaustgas,

` reetion and length.l

therefore, when coming from the engine rushes into pipe 7 and is brokenu into streams which flow through the tu es 31 and from which the4greater part of the noise energy is extracted on account of the resistance of the tubes, the noise factors being further reduced and destroyedby the irregular lty or differential arrangement of thetubes,

the gases then flowing through outlet 2t),

and pipe 21 into the draftflue Q4 and tothe atmosphere. The gases areprojected longi-v tudinal-ly through the draftjiue and creat/e more orless vacuum effect, which increases the boiler draft in a mannerWell-known in the art. Auxiliary outlets in the form of small holes 30'may also be provided to assist in breaking up' the face and thedirection of the. gas streams.

ln Figs. 3 and 4 is shown a modified ar rangement. Instead of formin theresistance @duction passageways of'tu es, the pipe 7 could haresuiiiciently thick Walls throu h which the passageways 3() are drilled.T e passageways thus formed could be of varying diameter and direction.

Other arrangements and constructions are also possible, which wouldproduce the varions features of fny invention, and I do not, therefore,wish to limit myself to the particular constructions and arrangementsshown.

[desire to secure the following claims by Letters Patenti 1 Tn a muller,the combination of a pipe adapted for connection with' an en ine toreeei\ e the exhaust gases, and a multiplicity of ,small-bore tubesextending from said pipe in different and irregular directions, saidtubes being also of different len the.

2. In a mutller, the combination o a pipe closed at one end and adaptedfor connection at its other end with an engine to be mutlied, and aplurality of out-lets from the interior to the exterior of said pipe,said outlets being irregular as to their direction, length and size.

3. Tn a mutiler, the combina-tion of a, pipe closed at one end andadapted for connection at. its other end with an engine to be muiiled,

`and a plurality of fine tubes supported b and connecting the interiorof the p ipe wit the exterior thereof, eind tubes belngrela.- tivelyirregular and different ais to their 4d1- 4. Tn a. muiller, thecombination of a shell forming an expansion chamber, a pipe egctendiugcentrally through said shell, the entrance to the en( of said pipe beingada ted for connection with an engine to be mu ed, the. `other end ofsaid pipe being closed by an end wall of said lshell, and a plurality ofhigh-resistance outlets for connecting said ether end of the pipe withthe interior of the shell, there being an atmosphere outlet from saidshell near the entrance end of Suid pipe. i

5. In a muliier, the combination of a cylindrical shell forming anexpansion chamber, a pipe extending centrally through the shell, tlieentrance end of said pipe extending through one end Wall of said shelland adapted for connection with the engine to be muliled, the other rndof said pipe screwing into the other end of said shell to be closedthereby, and an outlet for connect-ing said other end. of the pipe withthe expansion chamber, said outlets being relatively irregular as totheir direction, there being an atmosphere outlet from the shell nearthe entrance end of the pipe.

G. In a mutiier, the combination of a cylindrical shell, a pipeextending centrally through said shell, the entrance end vof the pipeextending through one end wall of the shell and adapted for connectionwith an engine to be muilied, the other end of said plpe being supportedand closed by the other end wall of said shell, and a multiplicity ofsmall-bore tubes connecting said other end of the pipe with theexterior, said tubes being irregular as to size, direction and length,there being a. single outlet from said shell connected with theatmosphere.

7. In a muliler, the combination of a pipe adapted for connection withan engine to receive the exhaust gases, a multiplicity of tubesextending from said pipe in different and irregular directions, the boreand length of said tubes being such that flow therethrough is deprivedof the pres'tlre element to cause the gas to issue in t e form ofcompact jets having only a velodity element.

8. In a moitier, the combination of a pipe adapted for connection withan engine to receive the exhaust gases, a multiplicity of tubesextending from said pipe in different and irregular directions, the boreand length of said tubes being such that flow therethrough is deprivedof the pressure element to cause the gas to issue in the form of compactjets having only a velocity element, said pipe extending differentiallyagainst each other.

9. In a mutller, the combination of a pipe adapted for connection withan,engine to receive the exhaust gases, and a multiplicity of small boretubes extending from said pipo to break the gas flow into a plurality ofjets, the walls of said tubes at their ends being perforated to furtherassist in breaking up of the gas flow. f

l0. In a mutller for origines, the combination of a irst cylindricalcompartment for receiving the exhaust gases, a concentricl compartmentfor receiving such gases from the first (compartment, and au annularpartition separating such colmmrtlnents, such partition having formedtherethrough a plurality of holes of less diameter than length to affordsurfaces for frictional engagement with the exhaust gases.

1l. In a muffler for en ines, the combination of two concentric tu es ofdifferent diameter adapted to form two compartments, one of suchcompartments adapted to be connected to the engine to receive theexhaust gases and communicating with the other compartment solely bymeans of openings of smaller diameter than length through the innertube, such other compartment having a free outlet opening to theatmosphere.

12. In a muffler for engines, the combina-- tion of a rst compartmentfor receiving the exhaust gases, and a secondcompartment for receivingsuch gases from the first compartment and delivering the same to theatmosphere, such compartments formed by means of two concentric tubes ofdifferent. size, the inner tube being comparatively thick and having amultiplicity of small bore holes formed therethrough.

13. In a muiller for engines, the combination of a rst pipe, a secondpipe disposed within the first pipe and small bore tubes extending fromthe second pipe and adapted to afford high surface resistance to thepassae of exhaust gases from one pipe to the ot er.

14. In a muflier for engines, the combination of a first pipe, and asecond pipe disposed within the first pipe, such second pipe havingformed therethrough openings of small bore relatively to their length toai'ord high surface resistance to the passage of exhaust gases from onepipe to the other.

15. In a muflier for engines, the combination of a 'first compartmentfor receiving the exhaust gases, a second compartment adapted to deliverthe exhaust gases from the mufller, and small bore tubes extendin fromone compartment to the other suclgi tubes being of different lengths andextending in different directions.

16. In a mutlier for engines, the combination of a first compartment forreceiving. the exhaust gase, and a second compartment adapted to deliverthe exhaust gases from the mutlier, 'such compartments separated by apartition having formed there-' through a plurality of openings of smallbore relatively to their length to afford a high surface resistance tothe passage of the exhaust gases from the first to the see` ondcompartment.

In Witness whereof, I hereunto subscribe my name this 8th day ofDecember A. D.

WILLIAM H. WINSLUW. Witnesses CHARLES J. SCHMIDT, FRANK J. 'Fm-uam.

